Doctoral Dissertations

Abstract

"The recrystallization temperature and the mechanical properties of tensile strength, elongation, reduction in area and hardness were determined for 99.97% indium. Metallographic techniques were developed and stress rupture data were obtained.

Single crystals of indium were grown in a horizontal furnace with a traveling temperature zone, and sectioned in a strain-free manner, with an etch-cutter. Because of the low recrystallization temperature of indium, no further work was done on the single crystals.

The effect of recrystallization on electrical resistance, thermoelectric force, hardness, bending strength, crystallographic orientation and microstructure was studied. The range of recrystallization temperature for small amounts of cold work was from -40° to 0° C and for large amounts of cold work was from -11° to -70° C.

The mechanical properties were found to be a follows: hardness, 0.72 Brinell, 1.197 Knoop and 1.266 to 1.402 DPH; tensile strength 388 psi.; elongation, 70%; and reduction in area, 95%. Stress rupture data were obtained, and a master rupture was plotted for indium.

A major improvement was made in the etching procedure which employed aqua regia to show grain orientation and contrast. The use of the etch-cutter to obtain unrecrystallized microstructures was also unique"--Abstract, page i.

Advisor(s)

Eppelsheimer, Daniel S., 1909-1988

Department(s)

Materials Science and Engineering

Degree Name

Ph. D. in Metallurgical Engineering

Sponsor(s)

Missouri School of Mines and Metallurg. Department of Metallurgical Engineering

Publisher

Missouri School of Mines and Metallurgy

Publication Date

1959

Pagination

viii, 104 pages

Note about bibliography

Includes bibliographical references (pages 85-88).

Rights

© 1959 Louis John Reitsma, Jr., All rights reserved.

Document Type

Dissertation - Open Access

File Type

text

Language

English

Subject Headings

Indium -- Mechanical propertiesRecrystallization (Metallurgy)Indium -- Metallurgy

Thesis Number

T 1217

Print OCLC #

5927325

Electronic OCLC #

915838830

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